Add a method to set codecContext option, e.g. use it to set bit rate.

Author: leonyu1010

source/ffmpeg-cpp/encode_video/encode_video.cpp

@@ -21,6 +21,9 @@ int main()
 		// parameter -qscale and must be within range [0,31].
 		codec->SetQualityScale(0);
 
+		// Set the bit rate option -b:v 2M
+		codec->SetGlobalOption("b", "2M");
+
 		// Create an encoder that will encode the raw audio data as MP3.
 		// Tie it to the muxer so it will be written to the file.
 		VideoEncoder* encoder = new VideoEncoder(codec, muxer);

source/ffmpeg-cpp/ffmpeg-cpp/Codecs/Codec.cpp

@@ -35,6 +35,11 @@ namespace ffmpegcpp
 		av_opt_set_double(codecContext->priv_data, name, value, 0);
 	}
 
+	void Codec::SetGlobalOption(const char* name, const char* value)
+	{
+		av_opt_set(codecContext, name, value);
+	}
+
 	AVCodecContext* Codec::LoadContext(AVCodec* codec)
 	{
 		AVCodecContext* codecContext = avcodec_alloc_context3(codec);

source/ffmpeg-cpp/ffmpeg-cpp/Codecs/Codec.h

@@ -20,6 +20,8 @@ namespace ffmpegcpp
 		void SetOption(const char* name, int value);
 		void SetOption(const char* name, double value);
 
+		void SetGlobalOption(const char* name, const char* value);
+
 		void SetGlobalContainerHeader(); // used by the Muxer for configuration purposes
 
 	protected: